Quadrotor model helicopter airframe



FIG. 1 is a top, right front perspective view of a quadrotor model helicopter airframe showing our new design;

FIG. 2 is a top, left rear perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a left side elevational view thereof;

FIG. 8 is a rear elevational view thereof;

FIG. 9 is bottom, right rear perspective view thereof; and,

FIG. 10 is bottom left front perspective view thereof.

The structural elements depicted by broken lines have been shown for the purpose of illustrating portions of the quadrotor model helicopter airframe that form no part of the claimed design. 

CLAIM We claim the ornamental design for a quadrotor model helicopter airframe, as shown and described. 